کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2844892 1166369 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Portal hypertension in 18-month-old rats: Memory deficits and brain metabolic activity
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی فیزیولوژی
پیش نمایش صفحه اول مقاله
Portal hypertension in 18-month-old rats: Memory deficits and brain metabolic activity
چکیده انگلیسی

Portal hypertension is a major complication of cirrhosis that frequently leads to a neuropsychiatric disorder that affects cognition. We compared the performance of 18-month-old prehepatic portal hypertensive rats (PH) and 18-month-old normal rats (CO) in spatial short-term and reference memory tasks in the Morris water maze and in active avoidance task. The PH group showed worse spatial short-term memory than the CO group. Also, the PH group tended to perform worse than the CO group in the reference memory task, but it presented a correct acquisition of the active avoidance task. We assessed the brain metabolic activity of the animals by means of cytochrome c-oxidase (COx) histochemistry. We found that the PH group developed prefrontal dysfunction characterized by increased COx activity in this region compared to the CO group. Similar results were found in the medial mammillary nucleus and dentate gyrus, whereas the CA1 area, bed nucleus of the stria terminalis, and supramammillary nucleus showed lower COx activity in the PH group as compared to the CO group. We conclude that the 18-month-old portal hypertensive rats present spatial memory impairment without alteration of implicit learning. This deficit could be related to the alteration of the metabolic activity of the brain regions involved in the processing of spatial memories.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physiology & Behavior - Volume 100, Issue 2, 11 May 2010, Pages 135–142
نویسندگان
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